# Generator code, what have I done?
**URL:** https://discourse.mc-stan.org/t/generator-code-what-have-i-done/2181
**Category:** Developers
**Created:** [October 12, 2017, 1:25am UTC](https://discourse.mc-stan.org/t/generator-code-what-have-i-done/2181 "2017-10-12T01:25:03Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@sakrejda](https://discourse.mc-stan.org/u/sakrejda)
#### Post date: [October 12, 2017, 1:25am UTC](https://discourse.mc-stan.org/t/generator-code-what-have-i-done/2181/1 "2017-10-12T01:25:03Z")
It’s telling me it doesn’t recognize the type but tells me exactly what the type is… @mitzimorris @Bob_Carpenter any ideas? Unless it’s an accidental circular include this makes no sense to me:
```
In file included from src/test/test-models/stanc.cpp:1:
In file included from src/stan/command/stanc_helper.hpp:6:
In file included from src/stan/lang/compile_functions.hpp:5:
In file included from src/stan/lang/generator/generate_standalone_functions.hpp:7:
In file included from src/stan/lang/generator/generate_function_instantiations.hpp:5:
In file included from src/stan/lang/generator/generate_function_instantiation.hpp:7:
src/stan/lang/generator/generate_function_instantiation_name.hpp:19:53: error: unknown type name
'function_decl_def'; did you mean '::stan::lang::function_decl_def'?
void generate_function_instantiation_name(const function_decl_def& fun,
^ ~~~~~~~~~~~~~~~~
::stan::lang::function_decl_def
```
---
### Author:  [@mitzimorris](https://discourse.mc-stan.org/u/mitzimorris)
#### Post date: [October 12, 2017, 1:47am UTC](https://discourse.mc-stan.org/t/generator-code-what-have-i-done/2181/2 "2017-10-12T01:47:02Z")
what branch?
---
### Author:  [@sakrejda](https://discourse.mc-stan.org/u/sakrejda)
#### Post date: [October 12, 2017, 1:49am UTC](https://discourse.mc-stan.org/t/generator-code-what-have-i-done/2181/3 "2017-10-12T01:49:59Z")
I haven’t pushed yet. I thought the type of error might look familiar. I
wrapped up for today so I’ll push tomorrow.
---
### Author:  [@mitzimorris](https://discourse.mc-stan.org/u/mitzimorris)
#### Post date: [October 12, 2017, 1:53am UTC](https://discourse.mc-stan.org/t/generator-code-what-have-i-done/2181/4 "2017-10-12T01:53:08Z")
check your includes?
---
### Author:  [@sakrejda](https://discourse.mc-stan.org/u/sakrejda)
#### Post date: [October 12, 2017, 2:20am UTC](https://discourse.mc-stan.org/t/generator-code-what-have-i-done/2181/5 "2017-10-12T02:20:09Z")
What am I checking for? The file with that specific struct is included…
---
### Author:  [@mitzimorris](https://discourse.mc-stan.org/u/mitzimorris)
#### Post date: [October 12, 2017, 12:23pm UTC](https://discourse.mc-stan.org/t/generator-code-what-have-i-done/2181/6 "2017-10-12T12:23:12Z")
sorry, not enough info here to help - please show file: src/stan/lang/generator/generate\_function\_instantiation\_name.hpp
what else have you changed?
---
### Author:  [@Bob\_Carpenter](https://discourse.mc-stan.org/u/Bob_Carpenter)
#### Post date: [October 14, 2017, 9:27pm UTC](https://discourse.mc-stan.org/t/generator-code-what-have-i-done/2181/7 "2017-10-14T21:27:41Z")
> [@sakrejda](#):
>
> src/stan/lang/generator/generate\_function\_instantiation\_name.hpp:19:53: error: unknown type name
> ‘function\_decl\_def’; did you mean ‘::stan::lang::function\_decl\_def’?
> void generate\_function\_instantiation\_name(const function\_decl\_def& fun,
> ^ ~~~~~~~~~~~~~~~~
> ::stan::lang::function
That looks like you’re not inside the `stan::lang` namespace.
---
### Author:  [@sakrejda](https://discourse.mc-stan.org/u/sakrejda)
#### Post date: [October 16, 2017, 8:30pm UTC](https://discourse.mc-stan.org/t/generator-code-what-have-i-done/2181/8 "2017-10-16T20:30:28Z")
Turns out the solution to this mystery was that a completely different file that never showed up as a problem (I had edited it) was one closing paren short in the middle of the file so it put this file inside of the `stan` namespace… so the inside code was in the `stan::stan::lang` namespace.
---
### Author:  [@Bob\_Carpenter](https://discourse.mc-stan.org/u/Bob_Carpenter)
#### Post date: [October 22, 2017, 2:19am UTC](https://discourse.mc-stan.org/t/generator-code-what-have-i-done/2181/9 "2017-10-22T02:19:43Z")
Not surprising. The compiler was clearly indicating you weren’t in `stan::lang::` or hadn’t included the file with the declearations you needed.